package com.atguigu.gulimall.ware.service.impl;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.exception.NoStockExcetion;
import com.atguigu.common.to.mq.OrderTo;
import com.atguigu.common.to.mq.StockDetailTo;
import com.atguigu.common.to.mq.StockLockedTo;
import com.atguigu.common.utils.R;
import com.atguigu.gulimall.ware.entity.WareOrderTaskDetailEntity;
import com.atguigu.gulimall.ware.entity.WareOrderTaskEntity;
import com.atguigu.gulimall.ware.feign.OrderFeignService;
import com.atguigu.gulimall.ware.feign.ProductFeignService;
import com.atguigu.gulimall.ware.service.WareOrderTaskDetailService;
import com.atguigu.gulimall.ware.service.WareOrderTaskService;
import com.atguigu.gulimall.ware.vo.OrderItemVo;
import com.atguigu.gulimall.ware.vo.OrderVo;
import com.atguigu.gulimall.ware.vo.SkuHasStockVo;
import com.atguigu.gulimall.ware.vo.WareSkuLockVo;
import com.rabbitmq.client.Channel;
import lombok.Data;
import org.apache.commons.lang.StringUtils;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.ware.dao.WareSkuDao;
import com.atguigu.gulimall.ware.entity.WareSkuEntity;
import com.atguigu.gulimall.ware.service.WareSkuService;
import org.springframework.transaction.annotation.Transactional;


@Service("wareSkuService")
public class WareSkuServiceImpl extends ServiceImpl<WareSkuDao, WareSkuEntity> implements WareSkuService {

    @Autowired
    WareSkuDao wareSkuDao;


    @Autowired
    OrderFeignService orderFeignService;

    @Autowired
    WareOrderTaskService orderTaskService;

    @Autowired
    WareOrderTaskDetailService orderTaskDetailService;

    @Autowired
    ProductFeignService productFeignService;


    @Autowired
    RabbitTemplate rabbitTemplate;


    private void unLockStock(long skuId, Long wareId, Integer num, Long taskDetailId) {
        System.out.println("解锁操作+"+skuId+""+ wareId+""+ num);
        wareSkuDao.unLockStock(skuId, wareId, num);
        WareOrderTaskDetailEntity entity = new WareOrderTaskDetailEntity();
        entity.setId(taskDetailId);
        entity.setLockStatus(2);//i解锁
        orderTaskDetailService.updateById(entity);
    }


    @Override
    public PageUtils queryPage(Map<String, Object> params) {

        /**
         * wareId(仓库id)
         * skuId(商品id)
         */
        QueryWrapper<WareSkuEntity> wareSkuEntityQueryWrapper = new QueryWrapper<>();
        String skuId = (String) params.get("skuId");   //获取商品id
        if (!StringUtils.isEmpty(skuId)) {     //判断商品id是否为空
            wareSkuEntityQueryWrapper.eq("sku_id", skuId);
        }
        String wareId = (String) params.get("wareId");   //获取仓库id
        if (!StringUtils.isEmpty(wareId)) {              //判断仓库id是否为空
            wareSkuEntityQueryWrapper.eq("ware_id", wareId);
        }


        IPage<WareSkuEntity> page = this.page(
                new Query<WareSkuEntity>().getPage(params),
                wareSkuEntityQueryWrapper
        );

        return new PageUtils(page);
    }

    @Override
    public void addStock(Long skuId, Long wareId, Integer skuNum) {
        //1.判断如果没有这个库存记录就新增
        List<WareSkuEntity> entities = wareSkuDao.selectList(new QueryWrapper<WareSkuEntity>().eq("sku_id", skuId).eq("ware_id", wareId));
        if (entities == null || entities.size() == 0) {
            WareSkuEntity skuEntity = new WareSkuEntity();
            skuEntity.setSkuId(skuId);
            skuEntity.setStock(skuNum);
            skuEntity.setWareId(wareId);
            skuEntity.setStockLocked(0);//默认锁定数量
            //TODO 远程查询sku名字   如果失败整个事务无需回滚
            try {
                R info = productFeignService.info(skuId);
                Map<String, Object> date = (Map<String, Object>) info.get("skuInfo");
                if (info.getCode() == 0) {
                    skuEntity.setSkuName((String) date.get("skuName"));
                }
            } catch (Exception e) {

            }


            wareSkuDao.insert(skuEntity);
        } else {
            wareSkuDao.addStock(skuId, wareId, skuNum);
        }

    }

    @Override
    public List<SkuHasStockVo> getSkusHasStock(List<Long> skuIds) {
        List<SkuHasStockVo> collect = skuIds.stream().map(skuId -> {

            SkuHasStockVo vo = new SkuHasStockVo();
            //查询当前sku的总库存量
            Long count = baseMapper.getSkuStock(skuId);
            vo.setSkuId(skuId);
            vo.setHasStock(count == null ? false : count > 0);

            return vo;
        }).collect(Collectors.toList());

        return collect;
    }

    /**
     * 为某个订单锁定库存
     * (rollbackFor = NoStockExcetion.class)
     * 默认运行时异常就回滚
     *
     * @param vo
     * @return 库存解锁场景
     * 1.）下订单成功 订单过期未支付，用户手动取消
     * 2.）下订单库存锁定成功，接下来业务
     */
    @Transactional(rollbackFor = NoStockExcetion.class)
    @Override
    public Boolean orderLockStock(WareSkuLockVo vo) {

        /**
         * 保存库存工作单的详情
         *
         *
         */
        WareOrderTaskEntity taskEntity = new WareOrderTaskEntity();
        taskEntity.setOrderSn(vo.getOrderSn());
        orderTaskService.save(taskEntity);
        //1.按照下单的收货地址,找到一个就近仓库，锁定库存

        //1.找到每个商品在那个仓库有库存
        List<OrderItemVo> locks = vo.getLocks();
        List<SkuWareHashStock> collect = locks.stream().map(item -> {
            SkuWareHashStock stock = new SkuWareHashStock();
            Long skuId = item.getSkuId();
            stock.setSkuId(skuId);
            stock.setNum(item.getCount());
            // 查询这个商品在哪里有库存
            List<Long> wareIds = wareSkuDao.ListWareIdHasSkuStock(skuId);
            stock.setWareId(wareIds);
            return stock;
        }).collect(Collectors.toList());

        //锁定库存
        for (SkuWareHashStock hashStock : collect) {
            Boolean skuStock = false;
            Long skuId = hashStock.getSkuId();
            List<Long> wareIds = hashStock.getWareId();
            if (wareIds == null || wareIds.size() == 0) {
                //没有库存
                throw new NoStockExcetion(skuId);
            }
            for (Long wareId : wareIds) {
                long count = wareSkuDao.lockSkuStock(skuId, wareId, hashStock.getNum());
                if (count == 1) {
                    skuStock = true;
                    //TODO 库存锁定成功
                    WareOrderTaskDetailEntity entity =
                            new WareOrderTaskDetailEntity(null, skuId, "", hashStock.getNum(), taskEntity.getId(), wareId, 1);
                    orderTaskDetailService.save(entity);
                    StockLockedTo lockedTo = new StockLockedTo();
                    lockedTo.setId(taskEntity.getId());
                    StockDetailTo stockDetailTo = new StockDetailTo();
                    BeanUtils.copyProperties(entity, stockDetailTo);
                    //防止数据回滚数据不见
                    lockedTo.setDetailTo(stockDetailTo);
                    rabbitTemplate.convertAndSend("stock-event-exchange", "stock.locked", lockedTo);
                    break;
                } else {
                    // 当前仓库失败去下一个
                }
            }
            if (skuStock == false) {
                // 当前商品所有仓库都没锁柱
                throw new NoStockExcetion(skuId);
            }
        }

        //3.全部商品锁定成功

        return true;
    }

    @Override
    public void unlockStock(StockLockedTo to) {
        StockDetailTo detail = to.getDetailTo();
        Long detailToSkuId = detail.getId();
/*       //解锁
        //1.查询数据库关于锁订单的消息
        //有 库存锁定成功
        //  解锁:订单情况
        //      1.没这个订单，必须解锁
                2.有这个订单 不解锁库存
                订单状态 已取消 解锁
                        没去下 不解锁
        // 没有 库存锁定失败，库存回滚，无需解锁*/
        WareOrderTaskDetailEntity byId = orderTaskDetailService.getById(detailToSkuId);
        if (byId != null) {
            //解锁
            Long id = to.getId();
            WareOrderTaskEntity taskEntity = orderTaskService.getById(id);
            String orderSn = taskEntity.getOrderSn();//根据订单号查询订单状态
            R r = orderFeignService.getOrderStatus(orderSn);
            if (r.getCode() == 0) {
                System.out.println("顶顶那");
                //订单数据返回成功
                OrderVo data = r.getData(new TypeReference<OrderVo>() {
                });
                if (data == null || data.getStatus() == 4) {
                    //订单被取消 才能解锁库存
                    if (byId.getLockStatus() == 1) {
                        unLockStock(detail.getSkuId(), detail.getWareId(), detail.getSkuNum(), detailToSkuId);
                    }
                }
            } else {
                throw new RuntimeException("远程服务失败");
            }
        } else {
            //
        }

    }


    //防止订单服务卡顿，导致订单状态消息一致改不了
    // 导致卡顿订单永远不能解锁库存
    @Transactional
    @Override
    public void unlockStock(OrderTo orderTo) {
        String orderSn = orderTo.getOrderSn();
        //查一下订单最新状态 防止重复解锁库存
        WareOrderTaskEntity task = orderTaskService.getOrderTaskByOrderSn(orderSn);
        Long id = task.getId();
        // 按照工作单找到所有没有解锁库存 尽心解锁
        List<WareOrderTaskDetailEntity> entities = orderTaskDetailService.list(new QueryWrapper<WareOrderTaskDetailEntity>().eq("task_id", id)
                .eq("lock_status", 1));
        for (WareOrderTaskDetailEntity entity : entities) {
            unLockStock(entity.getSkuId(),entity.getWareId(),entity.getSkuNum(),entity.getId());
        }

    }

    @Data
    class SkuWareHashStock {
        private Long skuId;
        public Integer num;
        private List<Long> wareId;
    }
}